Short-Term Financing	6 Months Ended
Dec. 31, 2015
Short-Term Financing [Abstract]
Short-Term Financing	Note 8. Short-term Financing The Company has a $2.75 billion, 364-day credit agreement with a group of lenders that matures in June 2016. In addition, the Company has a five-year $3.25 billion credit facility maturing in June 2019 that contains an accordion feature under which the aggregate commitment can be increased by $500.0 million, subject to the availability of additional commitments. The Company also has a $2.25 billion five-year credit facility that matures in June 2020 that also contains an accordion feature under which the aggregate commitment can be increased by $500.0 million, subject to the availability of additional commitments. The interest rate applicable to committed borrowings is tied to LIBOR, the effective federal funds rate, or the prime rate depending on the notification provided by the Company to the syndicated financial institutions prior to borrowing. The Company is also required to pay facility fees on the credit facilities. The primary uses of the credit facilities are to provide liquidity to the commercial paper program and funding for general corporate purposes, if necessary. The Company had no borrowings through December 31, 2015 under the credit facilities. The Company’s U.S. short-term funding requirements related to client funds are sometimes obtained through a commercial paper program, which provides for the issuance of up to $8.25 billion in aggregate maturity value of commercial paper, rather than liquidating investments in available-for-sale securities related to previously-collected client funds. The Company’s commercial paper program is rated A-1+ by Standard & Poor’s and Prime-1 by Moody’s. These ratings denote the highest quality commercial paper securities. Maturities of commercial paper can range from overnight to up to 364 days. At December 31, 2015 and June 30, 2015, the Company had no commercial paper outstanding. For the three months ended December 31, 2015 and 2014, the Company had average daily borrowings of $3.3 billion and $3.0 billion, respectively, at weighted average interest rates of 0.2% and 0.1%, respectively. For the six months ended December 31, 2015 and 2014, the Company had average daily borrowings of $3.4 billion and $3.1 billion, respectively, at weighted average interest rates of 0.2% and 0.1%, respectively. The weighted average maturity of the Company’s commercial paper during the three and six months ended December 31, 2015 was approximately two days. The Company’s U.S. and Canadian short-term funding requirements related to client funds obligations are sometimes obtained on a secured basis through the use of reverse repurchase agreements, which are collateralized principally by government and government agency securities, rather than liquidating investments in available-for-sale securities related to previously-collected client funds. These agreements generally have terms ranging from overnight to up to five business days. At December 31, 2015 and June 30, 2015, there were no outstanding obligations related to the reverse repurchase agreements. For the three months ended December 31, 2015 and 2014, the Company had average outstanding balances under reverse repurchase agreement of $334.9 million and $598.6 million, respectively, at weighted average interest rates of 0.3% and 0.5%, respectively. For the six months ended December 31, 2015 and 2014, the Company had average outstanding balances under reverse repurchase agreements of $410.2 million and $584.7 million, respectively, at weighted average interest rates of 0.4% and 0.5%, respectively. In addition, the Company has $3.25 billion available on a committed basis under the U.S. reverse repurchase agreements.

Note 8. Short-term Financing

The Company has a $2.75 billion, 364-day credit agreement with a group of lenders that matures in June 2016. In addition, the Company has a five-year $3.25 billion credit facility maturing in June 2019 that contains an accordion feature under which the aggregate commitment can be increased by $500.0 million, subject to the availability of additional commitments. The Company also has a $2.25 billion five-year credit facility that matures in June 2020 that also contains an accordion feature under which the aggregate commitment can be increased by $500.0 million, subject to the availability of additional commitments. The interest rate applicable to committed borrowings is tied to LIBOR, the effective federal funds rate, or the prime rate depending on the notification provided by the Company to the syndicated financial institutions prior to borrowing. The Company is also required to pay facility fees on the credit facilities. The primary uses of the credit facilities are to provide liquidity to the commercial paper program and funding for general corporate purposes, if necessary. The Company had no borrowings through December 31, 2015 under the credit facilities.

The Company’s U.S. short-term funding requirements related to client funds are sometimes obtained through a commercial paper program, which provides for the issuance of up to $8.25 billion in aggregate maturity value of commercial paper, rather than liquidating investments in available-for-sale securities related to previously-collected client funds. The Company’s commercial paper program is rated A-1+ by Standard & Poor’s and Prime-1 by Moody’s. These ratings denote the highest quality commercial paper securities. Maturities of commercial paper can range from overnight to up to 364 days. At December 31, 2015 and June 30, 2015, the Company had no commercial paper outstanding. For the three months ended December 31, 2015 and 2014, the Company had average daily borrowings of $3.3 billion and $3.0 billion, respectively, at weighted average interest rates of 0.2% and 0.1%, respectively. For the six months ended December 31, 2015 and 2014, the Company had average daily borrowings of $3.4 billion and $3.1 billion, respectively, at weighted average interest rates of 0.2% and 0.1%, respectively. The weighted average maturity of the Company’s commercial paper during the three and six months ended December 31, 2015 was approximately two days.

The Company’s U.S. and Canadian short-term funding requirements related to client funds obligations are sometimes obtained on a secured basis through the use of reverse repurchase agreements, which are collateralized principally by government and government agency securities, rather than liquidating investments in available-for-sale securities related to previously-collected client funds. These agreements generally have terms ranging from overnight to up to five business days. At December 31, 2015 and June 30, 2015, there were no outstanding obligations related to the reverse repurchase agreements. For the three months ended December 31, 2015 and 2014, the Company had average outstanding balances under reverse repurchase agreement of $334.9 million and $598.6 million, respectively, at weighted average interest rates of 0.3% and 0.5%, respectively. For the six months ended December 31, 2015 and 2014, the Company had average outstanding balances under reverse repurchase agreements of $410.2 million and $584.7 million, respectively, at weighted average interest rates of 0.4% and 0.5%, respectively. In addition, the Company has $3.25 billion available on a committed basis under the U.S. reverse repurchase agreements.